diff --git a/lib/OrdinaryDiffEqFIRKGenerator/test/ode_firk_tests.jl b/lib/OrdinaryDiffEqFIRKGenerator/test/ode_firk_tests.jl
index af42dca97b..bde7077368 100644
--- a/lib/OrdinaryDiffEqFIRKGenerator/test/ode_firk_tests.jl
+++ b/lib/OrdinaryDiffEqFIRKGenerator/test/ode_firk_tests.jl
@@ -1,8 +1,11 @@
 using OrdinaryDiffEqFIRK, OrdinaryDiffEqFIRKGenerator, DiffEqDevTools, Test, LinearAlgebra
-import ODEProblemLibrary: prob_ode_linear_big, prob_ode_2Dlinear_big
+import ODEProblemLibrary: prob_ode_linear, prob_ode_2Dlinear
+
+prob_ode_linear_big = remake(prob_ode_linear, u0 = big.(prob_ode_linear.u0), tspan = big.(prob_ode_linear.tspan))
+prob_ode_2Dlinear_big = remake(prob_ode_2Dlinear, u0 = big.(prob_ode_2Dlinear.u0), tspan = big.(prob_ode_2Dlinear.tspan))
 
 for i in [9], prob in [prob_ode_linear_big, prob_ode_2Dlinear_big]
     dts = 1 ./ 2 .^ (4.25:-1:0.25)
     sim21 = test_convergence(dts, prob, AdaptiveRadau(min_stages = i, max_stages = i))
     @test sim21.𝒪est[:final]≈ (2 * i - 1) atol=testTol
-end
\ No newline at end of file
+end